Core-making machine



O. SKEPPSTEQT CORE MAKING MACHINE vFiled March 5o, 925

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Patented Dec. 15, 1925.

UNITED STATES OLOF SKEPPSTEDT, OF MOLINE, ILLINOIS.

CORE-MAKING MACHINE.

Application filed March 30, 1925. Serial No. 19,469.

T o all whom t may concern:

Be it known that I, OLor SnnrrsrEDT, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in a Core-Making Machine, of which kthe following is a specification.

My invention has reference to core-inaking machines, and has for its chief purpose to provide a multiple core-making machine, in which the element of hazard due to injury to the completed cores, and consequent loss thereof, will be virtually eliminated. Theinvention has more special. reference to devices of the class setforth in Letters Patent of the United States. No. 1,417,577, sued `to myself May 30, 1922, in which the operation-of loosening the cores from the enclosing .boxes is accomplished by means of a vibratory apparatus of a special pattern. The machine is also designed to employ the style of core-boxes set forth in my ap lication for Letters Patent of the United 'States filed Nov. 18, 1922, Serial No. 600,625; and is fitted to produce cores of the efficient character set forth in my application for Letters Patent of the `United States filed Feb. 20, 1924, Serial No. 694,011. t can be used to articular advantage in shops of a limite capacity, and for use on jobs having a short run, and at the same time produce cores of a higheiiciency.

One of the ways in which it is undertaken to guard the perfected cores against any jar or shock, is by eliminating, so far as possible, the human element in the core-forining process. To this end the progress of the cores Athrough the machine is secured by means of .a smoothly running carriage, adapted for the support of astandard coreplate, .by means of which the cores are supported and conveyed through the machine, and which carriage is protected, so far as possible, from all jar or vibration, such as might tend to shake down and ruin the cores already produced. The easy and smooth movement of said carriage makes it possible for the operator to present the core-box, filled with sand ready for drawing, to the vibratory elements, and nicely locate the box full of cores in position in engagement therewith, without disturbing the groups of cores already drawn, and supported'fon the carriage. Means is also provided for adjusting the position of the vibratory mechanism with relation to the main frame, so that the position thereof can be accommodated to the varying weights upon the core-plate and carriage, and distribute the weight more equally, to prevent any binding action of the carriage in its support, which would interfere with the free movement thereof.

The smoothness of the operation of the carriage also enables the same to be returned with its load to a position convenient for the removal of the core-plate and the cores thereon, so as to submit such cores to the usual baking operation.

Another way in which it is sought to remove all sources of disturbance t0 the perfected cores is by providing' means for absorbing the vibratory movements of the members in contact 'with the core-box, so that such vibrations will not be communicated in a rearward direction to the frame of the machine, and through such frame to the core-plate and cores thereon. The natural vtendency of any such movement would be to shake down and ruin the cores. The absorption of the vibrations is accomplished in part by the peculiar construction of the brackets which support the vibratory members, so that a minimum amount of vibration will pass through 'the same, and partly by providing shock-absorbing material between such supports and the main frame. The desired effect is further produced by the installation of cushioned supports between the core-plate and carriage upon which it rests, to absorb any vibration which may remain, and permit the coreplate and cores to rest quietly between the vibratory elements. These cushions also produce an Vincreased frictional resistance between the core-plate and carriage, overcoming any tendency of the former to slip upon the latter, such as is liable to occur where one metal is supported upon another. Another purpose of the invention is to have the core-plate and'carriage conveniently vlocated with relation to the operator. Convenient means is also provided, such as knee-valve or foot-valve, by means of which the power may be applied to the vibratory mechanism, and the same set in motion.

The vabove mentioned, and other features and advantages of the invention will more fully appear from the following specification, taken in connection with the accompanying drawings, in which Fig. 1 is a plan view of the machine, with the core-plate removed.

Fig. 2 is a side elevation thereof, with a core-plate and groups of cores thereon in broken lines.

Fig. 3 is an end elevation of the machine, looking` at the end into which the cores are fed.

Fig. 11 is a detail of the knee-valve mechanism.

The reference number 1 indicates the main frame of the machine, rigidly supported on a bed-plate 2, by means of legs 3 on said `frame and bolts al passing through such legs into the bed-plate. For operative purposes the bed-plate is mounted on a bench or table 5. On opposite sides of the frame 1 are V-shaped tracks G and 7, along which are slidable travellers 8 and 9, by means of V -shaped recesses in the inner edges thereof, conforming` to the shapes of the tracl-.s The travellers 8 and 9 are supported by a pair of plates 11 and 12.v united by cross-plates 13, passing beneath the frame 1. Between the plates 8 and 11, and between the plates 9 and 12 are interposed pads 141 and 15, of rubber or other yieldable material` the purpose` of which pads is t-o absorb the impulses of the vibratory elements. as hereinafter more fully set forth.

The travellers 8 and 9 are secured to the plates 11 and 12, respectively, by means of bolts 16., passing downwardly through elongated openings 17 in said travellers, and seated in the plates 11 and 12. The heads of the bolts rest upon washers 1S, which bear against the upper faces of the travellers. Bj' loosening the bolts 16 an adjustment of the travellers with relation to the frame 1 is established. The position of said travellers is further established by means of bolts 19. passing through lugs 2O on the travellers 8 and 9. and seated in enlargements 21 on the plates 11 and 12. By a. careful adjustment of the travellers a requisite true and free movement thereof lengthwise of the frame is secured.

lVhen the machine is in operation it is desired to have the travellers 8 and 9 positively secured to the frame 1. and to this end one end of the plate 11 is projected into clamn sections 23. having beveled faces engaging' opposite sides of the track 6, and

` adapted to be drawn together b v a threaded pin 25. to the lower end of which is connected a handle 26, by means of a pivot pin 27. Bv turning the handle upwardly it can be employed for rotating the pin 25, to open or close the jaws 23, as desired. By clamping the sections 23 tightly to the track 6 the traveller mechanism is held immovably in place on the frame 1.

Supported on the pads 14 and 15 is a pair of brackets 30, by means of bolts 31 passing through the base-plates of said brackets, and into the plates 11 and 12. rlhe upper enus of said brackets are curved forwardly into arms 32, and to the ends thereof are secured clamps 33, the jaws of which embrace vertical rods 34, which extend downwardly at the sides of the frame 1. On the lower ends of said rods are lixed couplings S5, connected by a cross-bar 36, to which is attached a vibratory device 37, by means of a connection 38. Said vibrator-y device is connected by a hose 39 with a source of power. which in the present case would be in thc nature of air-control mechanism. 'lhc rods 34. also act as guides to assist in preperly positioning the core-box to receive the vibratory action. Said bars are also capable of vertical adjustment in the clamps to vary,v the vibratory tension thereof. rlhis vibratory mechanism is similar to that set -forth in said former patent, and no further description thereof is necessary. There is a difference, however, in the brackets 30. which are of a uniform thickness, but the width of which is gradually reduced upwardly. As a result the lower ends of said brackets possess a greater rij `dity, and are less susceptible to the action of the vibratory mechanism, which is communicated from the rods 311 to said brackets and the arms 32 thereof. As a result the vibrator-y impulses are graduali;v dissipated as they traverse said brackets, and very little jar is noticeable in the baseplates of said brackets. The relative thinness of the brackets 30, however, causes the same to have suflicient flexibility and resiliency so as not to intcrfere'at all with the perfect action of the rods 34.

lf any movement is iu'iparted to the bases of the brackets 5() it will be absorbed by the rublwr pads 111 and preventing suoli movement from being con'nnunicated through the plates 1l and 12 to the traveller mechanism. and from said last-named mechanism to the frame 1.

On the upper face of the frame 1 are plain ways L10. upon which is slidablj7 mounted a carriage Ai1. Guide-rails 42 are also secured to the frame 1, entering channels in the edges of the carriage, and insvine a smooth. steadv movement of the carriage. and without danger of jar or vibration to the core-plate or cores supported on said carriage. The ends of the carriaxje 11 are provided wtih hand-holds 15, and at intervals thereon are cleats 116, transrei-sel;y of the carriage, in which are held pads 417 of rubber er similar material, upon which the core-plateA rests. A core-plate of the class used in said machine is indicated in broken lines at 41S, and at one end thereof, shown as positioned against the rods 34,.is a core-box 49. The rest ofthe coreplate is shown filled with groups of Vcores 50. The pads .47 are designed to absorb anyvibration which might otherwise be communicated from 4,the .frame 1 or carriage 41 to the core-plate, and they also otferfric-tion resistance to the core-plate, to prevent accidental movement thereof upon the carriage.

The hose ,89 is connected with va main line pipe 52, (Fig. 3) in ywhich is located a shut-oitl valve 53. Adjacent thereto is a valve 541,normally vclosed, but adapted to be opened by knee pressure against a lever 55, swingingly attached to the bench 5 as at (1,. The leverand valve move freely and easily, without `imparting any jar to the machine. `It will be understood `that other mechanical devices and powers ycan be substituted for those set forth herein for the operation of the vibrator. For instance, the same could kbe electrically actuated.

If kit is desired the brackets 30 can be set at a greater distance apart, by setting the belts 31 in openings 56 inthe `outer ,parts of the yplates 11 and l12. A .greater spacing of the rodsi34 can also be secured by adjustment of the .couplings 35 on the cross-bar 36. By this meansfthe-,machine is capable of receiving a core-plate of relatively greater Width.

'In the operation of the machine, ,it is established upon a bench ofl suitable construction, as shown, which vmay be a .core makers regular bench.. The ktravellermechanism, with a vibrator rods supported thereby, .is then Ipositioned at that end of the frame 1 which is ,shown at the ,left in Figures 1 vand 2, rand secured firmly .in place. A core `plate is then placed ,upon thel carriage 41 resting .upon ythe ,pads-4f7, and with its edges free from contact with the vibrator rods. The carriageltl lis then moved .soas to bring the .rear end thereof as near the vfront off-the machine as possible, so as to establish .the first :row of cores near that end of the core-plate. The intensity or' the vibration to be produced is then regulated by adjustment of the rods 34, or by controlof the supply .of aircom ing through the Amain pipe. The blocks 35 can also be adjusted vertically upon the rods 34, giving a further variation ,to .the vibration. In this kmanner the vibration can be ,made to kconformto any class of Work that is to be done on the machine,

After the above matters have y.been thoroughly established fa corebox, of the kind set forth iny said application No. 600,625, is filled with Fand in any suitable manner, and placed `on the core-,plate 48, and is moved into contact with the vibrator rods by means of fthe carriage 41. The lever .55 is then actuated, giving .the desired vibration to the .core-box, and loosening ,the sand there` from. 1While the vibration continues the core-box is drawn fromY the cores, and returned to be re-lilled. After being re-illed with sand it is placed upon the core-plate again, as close as convenient to the row of cores just formed. The carriage 11 is again moved, to bring the core-box into engagement With the vibrator rods again. This op. eration is continued until the core-plate is filled with rows of the cores, whereupon it is removed from the carriage and conveyed to the point Where the cores are to be baked. Another core-plate is then placed on the carriage, and the forming of the cores proceeded with as before.

As the loading of the core-plate proceeds, the Weight of the projecting end thereof overbalances thatof the rest of the carriage, and as a consequence there is a tendency of the carriage to bind on theguides 42. To remedy this. the clamp-jaws 23 are released, and the travellers S and 0 moved to a point nearer the front of the machine, Where they are again secured in place. The carriage 41 is then moved to a point to conform to the new position of the vibrating devices, and the Weight is again more evenly distributed. This can be 'done a number of times during the operation, if desired. This shifting ofthe Weight of the carriage and its load not only helps to distribute the Weight thereof, but it keeps the same in a position more convenient to the operator.

There has been shown and described herein aparticular embodiment of the machine, more specially adapted lfor core-making, but it Willbe obvious to those skilled in theart, that it is-not limited `to that field, but can'be use'dv for making molds. Neither do I vWish to Vlimit myself to the particular construction or arrangement of parts set forth herein, as changes and substitutions can be made therein Without departing from the spirit of the invention.l f

Through the use of the apparatus described herein it becomes proiitable to use gangcore boXeson many jobs which Would not justify the construction of the larger boxes, and that still have a production high enough to make an increase inthe production rate desirable. The practice has been to make gang core boxes of approximately the same size as are to be used in the smaller types of this machine. These former core boxes were -split so that the cores could be removed, and left a 1in, so that it was impossible to secure the finished Work which is now obtainable. Not only can the style of core-.boxes used .in the present machine be produced at no greater cost than those of the old type which were handled by hand, but on account of the `high quality of the coresproduced, and the comparatively high percentage of coressaved `by the `use of such machine, there is a great saving in the cost of production of the cores themselves.

What I claim, and desire to secure by Letters Patent, is:

l. In a machine of the class described, a suitably mounted frame; and a carriage slidable thereon, and provided with yieldable members on its upper face for the support of a core-plate.

2. In a machine of the class described, a suitably mounted frame; and a carriage slidably mounted thereon, and provided on its upper face with yieldable and frictional members, adapted for the support of a coreplate.

3. In a machine of the class described, a suitably mounted frame, provided with lon- `gitudinal guiding members; a carriage slidable on said frame, adapted for the support of a core-plate, and having means for cooperating with said guidingr members; and one or more vibratory members mounted in proximity to said frame.

4. In a machine of the class described, a suitably mounted frame, provided with longitudinal guiding members; a carriage slidable on sai'd frame, and provided with 'ineans for cooperation with said guiding members, to cause a smooth operation of the carriage; a pair of vibratory members, supported atthe sides of said frame, so as to be capable of joint operation; and means for imparting a vibratory action to s aid last-named members; said carriage being adapted for movement to present successive portions thereof to said vibratory members, for the purpose set forth.

5. In a machine of the class described, a suitably mounted frame, provided with tracks on its outer edges; a traveller mechanism movable on said tracks; one or more vibratory elements supported by said traveller mechanism; means for imparting a vibratory action to said elements; and means for presenting successive portions of a coreplate to said vibratory elements, for the purpose set forth.

6. In a device of the class described, a suitably mounted frame, provided with tracks along its side edges; a cross-frame mounted slidably on said tracks; means for holding said cross-frame in fixed positions on said tracks; vibratory elements supported by said cross-frame, at the sides of said firstnamed frame; means for imparting a vibratory action to said elements; and means for conducting a core-plate lengthwise of said frame, by successive stages, for the purpose named.

7. In a machine of the class described, a suitably mounted frame, a frame supported transversely thereof; a bracket supported on said transverse frame; and a vibratory member supported by the upper end of said bracket, said bracket being of uniform thickness, but increasing in width downwardly.

8. In a machine of the class described, a main frame; a cross-frame mounted thereon; a bracket supported on said cross-frame; a vibratory member supported by said bracket; and a shock-absorbing` material between said bracket and cross-frame, the shape of said bracket being such as to gra'dually dissipate the impulses of said vibratory member in a direction away therefrom.

9. In a machine of the class described, a main frame; a cross-frame mounted thereon; brackets supported on said cross-frame and provided at their upper ends with clamping devices; vertical vibratory rods supported by said clamping devices, so as to be capable of adjustment vertically thereof; and a carriage movable longitudinally of said main frame.

10. In a machine of the class described, a main frame; a cross-frame mounted thereon; brackets supported on said cross-frame, on opposite sides of the main frame; shock-absorbing pads interposed between said brackets and said cross-frame; rods supported by said brackets, so as to be vertically adjustable therein; means for imparting` a vibratory movement simultaneously to said rods; means for lateral adjustment of said rackets, to permit a variation in the spacing of said rods; and a conveying device movable longitudinally of said main frame, capable of presenting a core-plate to said rods, by successive stages.

11. In a machine of the class described, a main frame; a cross-frame mounted thereon; brackets supported on said cross-frame, on opposite sides of the main frame; shock insulators interposed between said brackets and cross-frame; vibratory rods mounted in the free ends of said brackets, so as to be capable of adjustment vertically therein; a cross-bar uniting the lower ends of said rods; means for adjustment of said rods with relation to said cross-bar, to vary the spacing of the lower ends thereof; means for adjustment of said brackets laterally. to vary the spacing of the upper ends of said rods; means for imparting a vibratory action to said cross-bar; and a core-plate conveyor, capable of presenting` successive portions of a core-plate to said vibratory rods, for the purpose mentioned.

12. In a machine of the class described, a main frame, provided on its edges with V-shaped tracks; a cross-frame provided with travellers recessed to engage said tracks, and capable of adjustment to or from the same; means for holding said cross-frame in fixed position on said main frame; brackets mounted on said crossframe, at opposite sides of the main frame; vibrator rods supported by said brackets; a cross-bar uniting said rods, and adjustable vertically thereof; means for imparting a vibratory movement to said cross-bar; shock-absorbing members interposed between said brackets and said cross-frame; and a carriage slidable on said main frame, between said rods, and provided on its upper face with yieldable seats for a coreplate.

13. In a device of the class described, a suitably mounted main frame, provided on its edges with V-shaped ways; a cross-frame carrying travellers having recesses con forming to said ways, and slidable thereon; brackets supported on said cross-frame, on opposite sides of the main frame, provided at their free ends with clamping members; rods vertically supported in said clamping members, so as to be adjustable vertically thereof; a cross-bar uniting the lower ends of said rods; shockabsorbing members interposed between said brackets and said cross-plate; a vibratory element supported on said cross-bar; means for imparting a vibratory action to said element; means for varying the intensity of power of such action; and means for carrying a core-plate smoothly through said machine. I

14. In a machine of the class described, a suitably supported main frame, provided with V-shaped ways; a cross-frame, provided with travellers adapted 'for movement along said Ways; brackets supported on said cross-frame, on opposite sides of the main frame, said brackets being formed so as to present a gradually increasing resistance, downwardly, to the force of vibrations received at the free end thereof; rods supported by the free ends of said brackets; means for imparting a .vibratory movement to said rods; shock insulators between said brackets and said cross-frame; and a carriage slidable smoothly on said main rame, between said rods, and provided on its upper face with core-plate supporting means.

In testimony whereof I affix my signature.

OLOF SKEPPSTEDT. 

